As I understand:
In the good-old-days
we needed a JDBC type2 driver
- so we needed db2-client software to be installed on the WAS machine
- so we needed a db2 connect instance somewhere in our network to guide us to the mainframe (or AS400 a.k.a. system i). All part of the LUW product line.
Today (with the modern WAS versions) we only need a JDBC type4 driver to access the mainframe directly. No other db2/luw thingies
A different playing field for us LUW DBA's...even worse: they kicked is out.... they don't need us anymore